The Isteiner thresholds in the old Rhine (the actual Rhine), with their small sandy and stone beaches, are a popular local recreation area, which can be easily reached on the towpath that runs parallel to the Rhine; there is also one of the most popular nudist beaches in the border triangle. However, bathing in a federal waterway is strictly forbidden (see the provisions of the federal waterways).
As part of the integrated Rhine program of the state of Baden-Württemberg, work began at the beginning of 2009 on redesigning the bank area surrounding the "sills" (IRP Weil-Breisach, Section 1). On the German side of the Rhine, for example, a 1.2 km stretch of forest was cleared[1] and a cycle path was relocated to the newly created, flood-free so-called Randweg. The aim was to promote the development of near-natural floodplains along the Rhine from Märkt to Breisach by 2021 by graveling and lowering in several places and creating site-appropriate vegetation in order to create a larger floodplain. The action is complete. The retention of the amount of water due to the resulting increased roughness in the then flooded area in the Rhine river serves to restore the flood safety of the Upper Rhine below the Iffezheim lock.
A visitor platform was built in 2009 as an early compensation measure for the use of space. It cost about 160,000 euros. For those seeking relaxation, a warning lamp or signal should be installed to alert bathers to rapidly rising water due to the operation of the weir market by Electricité de France. However, this was not done for environmental and technical reasons. The platform is partly controversial among the population, it encroaches too massively on the natural landscape, but it is also a popular destination for excursions.[2] In the meantime, however, a second platform has been built for the spa town of Bad Bellingen and in Neuchâtel.